Garmin virb edit will not open on my windows 7 Toshiba laptop?? Help

Hi There,

I have just bought a garmin virb elite and only have an 8gb card for now.

I have imported any runs on to my laptop on windows as mp4.

I have tried downloading virb edit and every time i try to open it it asks to uninstall and i get a message saying Modify setup

What am i doing wrong, as the virb edit works on my iphone!!

Help Help Help